Letters

Design of study predisposed to type II error

BMJ 1995; 311 doi: http://dx.doi.org/10.1136/bmj.311.7013.1165 (Published 28 October 1995) Cite this as: BMJ 1995;311:1165

Sign in

Log in through your institution

Free trial

Register for a free trial to thebmj.com to receive unlimited access to all content on thebmj.com for 14 days.
Sign up for a free trial

Subscribe